Footwear sole



FIG. 1 is a perspective view of the footwear sole embodying the new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a front view thereof; and,

FIG. 6 is a rear view thereof.

FIGS. 1-6 show portions of an upper and a footbed in broken lines. The upper and the footbed are shown for environmental purposes and do not form any part of the claimed design. 

The ornamental design for a footwear sole, as shown and described. 